I interrupt booting the earlier kernel with Alt-F1 and log in.
It reports it can't find a display.
But sudo reboot and let GRUB launch the new kernel then works OK.
- Bug#684545: upgrade-reports: HTPC spontaneously reboots Alister Fisher
- Bug#684545: upgrade-reports: HTPC spontaneously reboot... Alister Fisher
- Bug#684545: Info received (Bug#684545: upgrade-rep... Alister Fisher
- Bug#684545: upgrade-reports: HTPC spontaneousl... Bill Allombert
- Bug#684545: upgrade-reports: HTPC spontaneously reboot... Julien Cristau

